package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     *新增菜品和对应的口味数据
     * @param dishDTO
     */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        // 向菜品表插入一条数据
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.insert(dish);
        // 获取菜品id
        Long dishId = dish.getId();

        // 向口味表插入多条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null && flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */

    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page =dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 批量删除
     * @param ids
     */

    public void deleteById(List<Long> ids) {
        //判断当前菜品是否能够删除---是否存在起售中的菜品？？
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断当前菜品是否能够删除---是否被套餐关联了？？
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds != null && setmealIds.size() > 0) {
            //当前菜品被套餐关联了，不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品表中的菜品数据
        dishMapper.deleteById(ids);
        //删除菜品关联的口味数据
        dishFlavorMapper.deleteByDishId(ids);
    }

    /**
     * 根据id查询菜品和对应的口味数据
     * @param id
     * @return
     */

    public DishVO getByIdWithFlavor(Long id) {
        DishVO dishVO = dishMapper.getByIdWithFlavor(id);
//        Dish dish = dishMapper.getById(id);
//        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);
//        DishVO dishVO = new DishVO();
//        BeanUtils.copyProperties(dish,dishVO);
//        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    /**
     * 修改菜品和对应的口味数据
     * @param dishDTO
     */
    public void updateWithFlavor(DishDTO dishDTO) {
        // 修改dish表
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.update(dish);
        // 修改口味表
        // 删除口味表中的数据
        List<Long> dishIds = new ArrayList<>();
        dishIds.add(dish.getId());
        dishFlavorMapper.deleteByDishId(dishIds);
        // 添加口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0){
            flavors.forEach(dishFlavor -> dishFlavor.setDishId(dishDTO.getId()));
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 修改菜品售卖状态
     * @param status
     * @param id
     */

    public void startOrStop(Integer status, Long id) {
        Dish dish = Dish.builder().id(id).status(status).build();
        dishMapper.update(dish);
    }

    /**
     * 根据分类id查询菜品
     * @param dish
     * @return
     */
    public List<Dish> list(Dish dish) {
        dish.setStatus(StatusConstant.ENABLE);
        List<Dish> list=dishMapper.list(dish);
        return list;
    }


    public List<DishVO> listWithFlavor(Long categoryId) {
        Integer status = StatusConstant.ENABLE;
        List<DishVO> dishVOList = dishMapper.getByCategoryId(categoryId, status);
        return dishVOList;
    }

}
